Re: Whats the %=C:% environment variable used for ?

Herbert Kleebauer <[email protected]> Fri, 6 Feb 2026 19:16:56 +0100

Newsgroups	alt.comp.os.windows-xp,alt.windows7.general,alt.comp.os.windows-10,alt.msdos.batch.nt
Organization	A noiseless patient Spider
Message-ID	<[email protected]>

On 2/6/2026 6:50 PM, Kenny McCormack wrote:

>>What about you typing it in your puters console and see for yourself ? 
>>Just type "echo %=C:%" and see what the result is.   No screenshot needed.
> 
> First, to answer the thread question: My understanding is that this *is*
> how processes in DOS/Windows keep track of the current directory for each
> drive.  

some more information about "Undocumented Dynamic variables":

https://ss64.com/nt/syntax-variables.html


and especially for the  %=C:% :

https://devblogs.microsoft.com/oldnewthing/20100506-00/?p=14133